According to the merck veterinary manual the average


According to the Merck Veterinary Manual, the average resting heart rate for a certain type of sheep dog is 115 beats per minute (bpm). A Montana farmer notices his aging sheep dog has been acting more lethargic than usual. He believes that her heart rate is slower than normal for her breed. The farmer measured the dog's heart rate on 15 occasions and found a sample mean heart rate of 110.2 bpm. (Here μ represents the mean heart rate of the farmer's sheep dog over all occasions.)

A. H0:μ=115,   HA:μ≠115 

B. H0:x¯=115,   HA:x¯>115 

C. H0:μ=115,   HA:μ>115 

D. H0:x¯=110.2,   HA:x¯≠110.2 

E. H0:μ=115,   HA:μ<115 

F. H0:μ=110.2,   HA:μ<110.2

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